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EPA Certification Exam Questions With Verified Answers.
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EPA Certification Exam Questions With Verified Answers. Which Refrigerants contain the most chlorine? - answerCFC's As of what date did it become unlawful to intentionally release Class 1 and Class 2 refrigerants to the atmosphere? - answerJuly 1, 1992 Which Refrigerants have the lowest zone d...
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